newcens

The email preferences that I have entered into my Express Invoice program seem to stop working after a few of my invoices have been sent out. #1 that at the very least shows me that I have entered them correctly. #2 It then stops sending my emails and feeds me a prompt saying "Email Authorization Username or Password Not Accepted (334)". The 334 I'm assuming is an error code. Does anyone have this problem and if so can it be fixed?